using System;
using System.Collections.Generic;
using NewLife.Data;
using XCode;
using XCode.Configuration;
using XCode.Membership;

namespace NewLife.Cube.Entity
{
    /// <summary>用户在线</summary>
    public partial class UserOnline : Entity<UserOnline>
    {
        #region 对象操作
        static UserOnline()
        {
            // 累加字段，生成 Update xx Set Count=Count+1234 Where xxx
            var df = Meta.Factory.AdditionalFields;
            df.Add(__.Times);
            //df.Add(__.OnlineTime);

            var sc = Meta.SingleCache;
            if (sc.Expire < 20 * 60) sc.Expire = 20 * 60;
            sc.FindSlaveKeyMethod = k => Find(__.SessionID, k);
            sc.GetSlaveKeyMethod = e => e.SessionID;

            // 过滤器 UserModule、TimeModule、IPModule
            Meta.Modules.Add<TimeModule>();
            Meta.Modules.Add<IPModule>();
        }

        /// <summary>验证并修补数据，通过抛出异常的方式提示验证失败。</summary>
        /// <param name="isNew">是否插入</param>
        public override void Valid(Boolean isNew)
        {
            // 如果没有脏数据，则不需要进行任何处理
            if (!HasDirty) return;

            // 截取长度
            CutField(_.Status, _.Page, _.Platform, _.OS, _.Device, _.Brower, _.NetType);

            // 建议先调用基类方法，基类方法会做一些统一处理
            base.Valid(isNew);
        }

        void CutField(params FieldItem[] fields)
        {
            foreach (var field in fields)
            {
                var len = field.Length;
                if (len > 0 && field.Type == typeof(String))
                {
                    var str = this[field.Name] as String;
                    if (!str.IsNullOrEmpty() && str.Length > len)
                    {
                        str = str[..len];
                        SetItem(field.Name, str);
                    }
                }
            }
        }
        #endregion

        #region 扩展属性
        #endregion

        #region 扩展查询
        /// <summary>根据编号查找</summary>
        /// <param name="id">编号</param>
        /// <returns>实体对象</returns>
        public static UserOnline FindByID(Int32 id)
        {
            if (id <= 0) return null;

            //// 实体缓存
            //if (Meta.Session.Count < 1000) return Meta.Cache.Find(e => e.ID == id);

            // 单对象缓存
            return Meta.SingleCache[id];

            //return Find(_.ID == id);
        }

        /// <summary>根据用户查找</summary>
        /// <param name="userId">用户</param>
        /// <returns>实体列表</returns>
        public static IList<UserOnline> FindAllByUserID(Int32 userId)
        {
            //// 实体缓存
            //if (Meta.Session.Count < 1000) return Meta.Cache.FindAll(e => e.UserID == userId);

            return FindAll(_.UserID == userId);
        }

        /// <summary>根据会话查找</summary>
        /// <param name="sessionId">会话</param>
        /// <param name="cache">是否从缓存查询</param>
        /// <returns>实体列表</returns>
        public static UserOnline FindBySessionID(String sessionId, Boolean cache = true)
        {
            if (sessionId.IsNullOrEmpty()) return null;

            if (cache)
            {
                //// 实体缓存
                //if (Meta.Session.Count < 1000) return Meta.Cache.Find(e => e.SessionID.EqualIgnoreCase(sessionId));

                return Meta.SingleCache.GetItemWithSlaveKey(sessionId) as UserOnline;
            }

            return Find(_.SessionID == sessionId);
        }

    /// <summary>根据会话查找</summary>
    /// <param name="sessionId">会话</param>
    /// <returns>实体列表</returns>
    public static IList<UserOnline> FindAllBySessionID(String sessionId)
    {
        if (sessionId.IsNullOrEmpty()) return new List<UserOnline>();

        // 实体缓存
        if (Meta.Session.Count < 1000) return Meta.Cache.FindAll(e => e.SessionID.EqualIgnoreCase(sessionId));

        return FindAll(_.SessionID == sessionId);
    }
        #endregion

        #region 高级查询
        /// <summary>高级查询</summary>
        /// <param name="userId">用户</param>
        /// <param name="sessionId">会话。Web的SessionID或Server的会话编号</param>
        /// <param name="start">创建时间开始</param>
        /// <param name="end">创建时间结束</param>
        /// <param name="key">关键字</param>
        /// <param name="page">分页参数信息。可携带统计和数据权限扩展查询等信息</param>
        /// <returns>实体列表</returns>
        public static IList<UserOnline> Search(Int32 userId, String sessionId, DateTime start, DateTime end, String key, PageParameter page)
        {
            var exp = new WhereExpression();

            if (userId >= 0) exp &= _.UserID == userId;
            if (!sessionId.IsNullOrEmpty()) exp &= _.SessionID == sessionId;
            exp &= _.CreateTime.Between(start, end);
            if (!key.IsNullOrEmpty()) exp &= _.Name.Contains(key) | _.SessionID.Contains(key) | _.Page.Contains(key) | _.Status.Contains(key) | _.CreateIP.Contains(key) | _.UpdateIP.Contains(key);

            return FindAll(exp, page);
        }

        //// Select Count(ID) as ID,SessionID From UserOnline Where CreateTime>'2020-01-24 00:00:00' Group By SessionID Order By ID Desc limit 20
        //private static readonly FieldCache<UserOnline> _SessionIDCache = new FieldCache<UserOnline>(nameof(SessionID))
        //{
        //    //Where = _.CreateTime > DateTime.Today.AddDays(-30) & Expression.Empty
        //};

        ///// <summary>获取会话列表，字段缓存10分钟，分组统计数据最多的前20种，用于魔方前台下拉选择</summary>
        ///// <returns></returns>
        //public static IDictionary<String, String> GetSessionIDList() => _SessionIDCache.FindAllName();
        #endregion

        #region 业务操作
        /// <summary>
        /// 设置错误
        /// </summary>
        /// <param name="error"></param>
        public void SetError(String error)
        {
            Status = error;
            LastError = DateTime.Now;

            SaveAsync(3_000);
        }
        #endregion
    }
}